166240686 has 8 divisors (see below), whose sum is σ = 332481384. Its totient is φ = 55413560.

The previous prime is 166240681. The next prime is 166240699. The reversal of 166240686 is 686042661.

166240686 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

166240686 is an admirable number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166240681) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13853385 + ... + 13853396.

It is an arithmetic number, because the mean of its divisors is an integer number (41560173).

Almost surely, 2^166240686 is an apocalyptic number.

166240686 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

166240686 is a wasteful number, since it uses less digits than its factorization.

166240686 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27706786.

The product of its (nonzero) digits is 82944, while the sum is 39.

The square root of 166240686 is about 12893.4357717406. The cubic root of 166240686 is about 549.8519557466.

The spelling of 166240686 in words is "one hundred sixty-six million, two hundred forty thousand, six hundred eighty-six".